Nut07/proof pending (#277)

* add pending state

* proofs spendable check and tests

* bump version to 0.12.3

* remove sleep for testing

* comment clarify

* use list comprehension in pending list

tests/test_wallet.py

@@ -367,3 +367,12 @@ async def test_p2sh_receive_with_wrong_wallet(wallet1: Wallet, wallet2: Wallet):
         wallet1.proofs, 8, secret_lock
     )  # sender side
     await assert_err(wallet2.redeem(send_proofs), "lock not found.")  # wrong receiver
+
+
+@pytest.mark.asyncio
+async def test_token_state(wallet1: Wallet):
+    await wallet1.mint(64)
+    assert wallet1.balance == 64
+    resp = await wallet1.check_proof_state(wallet1.proofs)
+    assert resp.dict()["spendable"]
+    assert resp.dict()["pending"]